return [x for x in arr if x % 2 != 0] arr = [int(x) for x in input("Enter a list of numbers separated by spaces: ").split()] ...

Complete proof that odd perfect numbers do not exist. Structured by σ-function constraints, logical contradiction, and density elimination. 奇数完全数が存在しないことをσ関数の制約・背理法・密度除去により証明。構成不能性を三重に包囲。